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DF-ORA

Information - Help 
ID = 28663
       
Country:
Great Britain (UK)
Brand: Mullard Radio Valve Co. Ltd.;
Tube type:  Triode, vacuum 
Identical to DF-ORA = DF_ORA
First year 1924 ? 70 Years of Radiotubes and V.

Filament
 
df_ora.jpg
DF-ORA: R.O.
Rudolf Osterkamp

 
df_ora_spec.png
DF-ORA: Banneitz, TB der drahtl. Teleph. 1927
Anonymous 15 Collector


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